Oar-lock.



J. CAMPBELL.

OAR LOOK.

, 910. 1,026,654. Patented May 21, 1912.

UNITED STATES PATENT OFFICE.

JOHN CAMPBELL, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR 0F FIFTY-ONE ONE-HUNDREDTI-IS T0 THOMAS E. MCDERMOTT, OF MINNEAPOLIS, MINNESOTA.

OAR-LOCK.

Specification of Letters Patent.

Application filed. May 12, 1910. Serial No. 560,939.

To all whom it may concern:

Be it known that I, JOHN CAMPBELL, a

citizen of the United States, residing at Minneapolis, in the county ofHennepin and State of Minnesota, have invented a new and usefulOar-Lock, of which the following is a specification.

This invention relates to oarlooks and its object is to provide a simpleand compact device of thischaracter which is cheap to manufacture and towhich an oar can be readily attached.

Another object is to provide an oarlock which does not interfere withany of the necessary movements of an oar and permits the oar to bereadily feathered.

A further object is to provide an oarlock which securely holds the oarunder all conditions, thus preventing its loss when released.

With these and other objects in view the invention consists of certainnovel details of construction and combinations of parts hereinafter morefully described and pointed out in the claim.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :-Figure 1 is a view partly in section and partly inelevation of an oar lock constructed in accordance with the presentinvention, the oar being shown in section within the oarlock. Fig. 2 isa section on line AB Fig. 1. Fig. 3 is a section on line C-D Fig. 1, theoar being shown in elevation. Fig. at is a view partly in section andpartly in elevation showing a modified construction.

Referring to the figures by characters of reference 1 designates a shankhaving an annular shoulder 2 adapted to limit the downward movement ofthe shank in the socket provided therefor and extending from the upperportion of the shank is a yoke 3 having a trunnion 4:. extendinginwardly from the free end thereof and directly opposite a locking pin 5which is slidably mounted in the upper end port-ion of the shank 1 andis connected to a spring strip 6 attached to the shank. This stripserves to hold the pin 5 normally projected beyond the shank 1 andtoward the trunnion 4c,

the said pin thus serving as a movable bearing for a ring 7. Said ringhas recesses 8 therein at diametrically opposed points, one of therecesses being adapted to receive the trunnion 4: while the pin 5 isadapted to pro ject into the other recess. The oar, which has beenindicated at 9, has plates 10 secured to opposite portions thereof, eachplate being provided with outstanding ears 11 arranged in pairs andspaced apart a distance slightly greater than the width of the ring 7.These plates are adapted to be secured to the oar in any suitable mannerand are preferably bowed transversely so as to fit snugly upon said oar.In assembling the parts the plates 10 are first placed within the ring 7and with said ring seated between the ears 11. The oar 9 is theninserted between the plates 10 and said plates are fastened to it. Itwill be apparent therefore that the oar can be rotated within the ringbut the ears 11 will prevent it from becoming displaced longitudinallyrelative thereto. After the oar has thus been mounted within the ring,said ring may be placed in position within the yoke 3 by placing thetrunnion 4c in one of the notches 8 and then pressing the surface of thering against the movable pin 5 until said pin is brought to a positionin register with the opposed recess 8 whereupon the pin will move intothe recess and thus lock the ring in position. After the shank 1 hasbeen placed in its socket, the oar can, obviously, be operated in theusual manner and, by reason of the fact that the oar can be rotatedwithin the ring 7, it will be apparent that there will be no diflicultyin feathering the oar. Should the oar be released, the ears 11, byengaging the ring 7, will prevent it from slipping out of the boat. Whenit is desired to ship the oar by detaching it from the oarlock, it ismerely necessary to pull outwardly on the spring 6 so as to withdraw thepin 5 from the adjoining recess 8. The said ring can then be slipped offof the trunnion 4 and thus re- A moved from the yoke.

Instead of utilizing a pin 5 and spring 6 such as shown in Fig. 1, ascrew 12 may be mounted within the shank 1, there being a thumb lever 13or the like at one end of the screw while the other end of said screw isreduced in diameter and adapted to proj ect into a socket in the ring 7.By turning the screw in one direction it can be disengaged from the ringand by turning it into the opposite direction it can be forced into thesocket so as to secure the ring in place.

It is of course to be understood that various changes may be made in theconstruction and arrangement of the parts without departing from thespirit or sacrificing any of the advantages of the invention as de finedin the appended claim. A

What is claimed is An oarlock including a yoke, a trunnion fixedrelative thereto, a movable trunnion alining with the fixed trunnion,the two trunnions being oppositely disposed within the yoke, a springfor holding the movable trunnion normally projected into the yoke, aone-pieced continuous ring having diametrically opposed recesses for thereception Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of the trunnions, oppositely disposed platesfor attachment to an oar, and spaced projections upon each plate forslidably engaging the ring, said plates being disposed within said ringand constituting means for holding an oar against longitudinal movementwithin the ring.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two Witnesses.

JOHN CAMPBELL.

WVitnesses:

SAMUEL BERMAN, CHAS. E. GoLDBLUM.

of Patents,

Washington, D. G.

